How do I adjust track tension on an excavator and know if it is too tight or too loose?

Question

VANROCK Track Solutions · Accepted Answer

Proper excavator track tension is set by measuring sag and adjusting the grease tensioner until the track sits within the machine maker’s recommended range for the work conditions. If the track is too tight, you’ll usually see faster wear, higher drive resistance, and extra load on rollers, idlers, and sprockets; if it is too loose, the track can flap, derail, or jump under load.

Start by cleaning packed mud and stones from the undercarriage, then park the machine on level ground and follow the OEM procedure for checking sag on the top run of the track. The correct setting depends on the machine size, whether it is a standard or hydraulic tension system, and whether you work mainly in mud, rock, snow, or hard ground. A few practical signs help confirm the setting: tracks that feel rigid and hard to move are often too tight, while a top run that sags excessively or walks sideways is often too loose.

Do not over-grease the adjuster. Release pressure slowly and keep hands clear of the grease fitting and recoil area. If the adjuster will not hold tension, or one side keeps going loose, inspect the tension cylinder, recoil spring, idler, seals, and track frame for wear or leakage. VANROCK supplies undercarriage parts for excavators through its dealer network and can quote replacement parts on request. If your machine is a Caterpillar, Komatsu, or another OEM brand, VANROCK is an independent manufacturer and is not affiliated with the OEM.